Biology - February 2007

2007-02-08 00:10:53 · 6 answers · asked by morty_shworts 1

2007-02-08 00:08:27 · 2 answers · asked by mdavis36000 1

Presumably the donor stem cells would contain the donor's own genetic information. Would the stem cell transplantee require the same drugs that prevent organ rejection or would the stem cells adapt/take on the new host DNA?

2007-02-07 23:00:41 · 2 answers · asked by Anonymous

2007-02-07 22:05:16 · 13 answers · asked by Loi 1

I know I need some sleep!..zzzzzzz

2007-02-07 20:50:46 · 10 answers · asked by Clark in the City 4

I'll give you some of the subjects in one chapter and you try to recognize whether it's a college level book or a high school's

this chapter is about genes and stuff :)

lack of dominance: two pages
complementary genes: one page
lethal genes:one page
multiple alleles: 3 pages
rhesus factor: one page
linkage and crodding over: 5 pages
genetic maps: one page

the book is 300 pages and has about 15 chapters.
so what do you think?

2007-02-07 20:49:47 · 3 answers · asked by Anonymous

2007-02-07 20:49:16 · 3 answers · asked by CherishAngel05 1

LIGHT MICROSCOPE:
Light microscopes shine light through a specimen and into an eyepiece for you to look at.
An electron microscope sprays electrons as a speciment in a vacuum. Data is collected on how the electrons reflect off of the specimen.
RESOLUTION:
The magnification of small things is a necessary facet of biological research, but the fine detail in cells and in subcellular components requires that any imaging system be capable of providing spatial information across small distances. Resolution is defined as the ability to distinguish two very small and closely-spaced objects as separate entities. Resolution is best when the distance separating the two tiny objects is small. Resolution is determined by certain physical parameters that include the wavelength of light, and the light-gathering power of the objective and condenser lenses. A simple mathematical equation defines the smallest distance (d min ) separating the two very small objects:
dmin = 1.

2007-02-07 19:37:44 · 2 answers · asked by churchill p 1

Why does soap water break down membranes that isolate DNA?
explain chemically.

Using what you know about the structure of DNA and chromatin in the nucleus, name one other molecule that must be removed from the precipitated DNA before you have the DNA molecule on its own?

2007-02-07 19:18:26 · 5 answers · asked by jytopy 4

We born in this earth by Man and women. What is the meaning of sex and how it is generated in our body?.
How soul is coming into one women body and get flesh, nerves bone and blood.
Any body can give the exact answer for this.

2007-02-07 19:14:29 · 16 answers · asked by rajaraman v 1

I have been going out with my boyfriend for 2.5 years now & we will be having our anniversary on Valentines day. He is in London for another 2 years while I am in Cape Town, what can I get him that will be really special & let him know that I'm thinking of him? Have you got any good, sweet ideas?

2007-02-07 19:10:33 · 3 answers · asked by Juliette D 3

Is leucine the most prevalent amino acid in the universe?

Is leucine more favoured than any other amino acid?

2007-02-07 18:53:19 · 4 answers · asked by The Knowledge Server 1

I live in Sacramento, so preferably programs around there, but i just need to know what good ones are out there.

I know of rsi already, but the deadline's already passed...

2007-02-07 18:22:26 · 4 answers · asked by Anonymous

i'm a high school student and i want to do some kind of original project, but i can't come up with any ideas on a project. Can anyone help me?

2007-02-07 18:16:01 · 6 answers · asked by Anonymous

Aside from what, how do "sea sponges" contribute to economic benefits?

2007-02-07 18:02:42 · 1 answers · asked by Brian C 2

What are the advantage/disadvantage between Michaelis-Menten,Lineweav... Plot to get the Vmax and Km.?
i have read from internet, and know that Lineweaver-Burk Plot will suggest some inaccuracy in the determination of the Vmax and Km, but why we still use it, i think that it must have some advantage to use Lineweaver-Burk Plot. so need some one to tell me? sorry my english is not good enough.

2007-02-07 17:56:52 · 2 answers · asked by teck kim 2

w/ hemophilia A which is a recessive X-linked disease. Neither parent has the disease. Couple # 2 had a normal son despite the fact that the father has hemophilia A. The 2 couples sued the hospital in court claiming that a careless staff member swapped their babies at birth. Evaluate their claim based on the genetic data presented.

2007-02-07 17:28:18 · 5 answers · asked by ruby 2

im not sure if its prokaryotic or eukoryotic? b/c then you would have to include archaea? im confused!! help please!!!

2007-02-07 17:19:00 · 4 answers · asked by summi_bear 2

Easy, but I think it was designed to be a little tricky.
1) How many pairs of chromosomes are in each somatic cell?
2) How many pairs of chromosomes are in egg or sperm?
My answers:
1) 23
2) none
Correct?

2007-02-07 17:11:20 · 3 answers · asked by Anonymous

Why are humans unable to acquire metabolic energy from cellulose?

2007-02-07 16:49:13 · 5 answers · asked by Anonymous

F2
Using a Punnett square, show the genotypes and phenotypes of:

1dk 2 dk 3 dk 4 dk 5 dk 6 dk
6 lt 5 lt 4 lt 3 lt 2 lt 1 lt
1/64 6/64 15/64 20/64 15/64 6/64 1/64

dk=dark
lt=light

2007-02-07 16:34:39 · 1 answers · asked by Anonymous

answers to any of these would be nice.
1) do you know its natural location? since it's produced by C botulinum im guessing it comes from soil and canned foods that werent properly sealed. and it affects humans if they ingest it. im not sure if i am right or not.
2) what is its function (what metabolic process is it involved in overall, what specific job does it do, what is the mechanism of its function)? i think it has to do with the toxin blocking off the receptors of the nerve to the muscle. but its just my guess im not sure.
3) the proteins structure, including secondary structire and overall 3D shape, the location of ligand binding sites for function and regulation. this i really dont know.

please help me. thanks.

2007-02-07 16:31:33 · 2 answers · asked by what? 7

best answer will be chosen - GUARANTEE

2007-02-07 16:21:20 · 2 answers · asked by practico 1

Also, I'm confused of what's different of a homologous chromosome and a sister chromatid/non-sister chromatid. I need to clear these things up b4 the test. Appreciate it. Thnks

2007-02-07 16:16:24 · 4 answers · asked by ruby 2

2007-02-07 15:57:57 · 6 answers · asked by harry_000 1

2007-02-07 15:57:37 · 3 answers · asked by Anonymous

2007-02-07 15:47:35 · 3 answers · asked by Anonymous

so there is a formula for the unknown diameter of field of view-

(magnification of "known" lense divided by maginification of "unknown" lense) times known diamter of f.o.v (field of view)

I know how to find the diamter of f.o.v by measuring it, and I know the "known" maginification (i set the scope to 40X), but what in the world is the "magnification of unknown lens"??

2007-02-07 15:40:23 · 1 answers · asked by da_bigunit 1

I have never done punnett squares and I do not know how to explain what I need. So heres my best shot I hope someone can help me!

Assume that “S” represents the dominant trait of having long leaves, and “s” represents the recessive short-leafed trait in a plant. In the parental generation, you cross a homozygous long-leafed plant with a homozygous short-leafed plant. Draw a Punnett square illustrating this cross, and give the genotypes and phenotypes of the F1 generation.

F1:AaBbCc x AaBbCc

lowercase= very light uppercase= very dark

2007-02-07 15:40:15 · 4 answers · asked by Anonymous

2007-02-07 15:35:01 · 3 answers · asked by Anonymous